Methyl 5-amino-3-(difluoromethyl)-2-methoxypyridine-4-acetate
Ethyl 3-amino-2-(difluoromethyl)-6-methoxypyridine-4-carboxylate
Methyl 5-amino-4-(difluoromethyl)-2-methoxypyridine-3-acetate
5-Amino-3-(difluoromethyl)-4-methoxypyridine-2-carboxylic acid